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Full text of "The manufacture and properties of iron and steel"

38
METALLUEGY OF IRON* AND STEEL.
which water is constantly played.   The cooling effect penetrates the thin brickwork, while the cooled iron shell alone is competent to
FIG. II-A.—BLAST FURNACE AT JONES & LAUGHLINS, PITTSBUKG, PA.
withstand the erosion of the stock, even if the brickwork be worn away.   A furnace in proper condition tends to deposit carbon, upon